chromaffin tissue a tissue composed largely of chromaffin cells, well supplied with nerves and vessels; it occurs in the adrenal medulla and also forms the paraganglia of the body. cicatricial tissue the dense fibrous tissue forming a cicatrix, derived directly from granulation tissue; called also scar tissue.
No. Unemployment, Social Security, retirement benefits, 401K pay outs, etc are not considered earned income for the purpose of calculating earned income credits.
Obviously, any income you earn by working for someone else will be considered earned income. Salaries, wages, tips, professional fees, business income (from self-employment), and farm income all count as earned income.